I think Inferno had stated that he was using Halo assets to try and replicate some of the multiplayer maps to fully test his engine, then move onto his own full indie game.

Correct me if I'm wrong Inferno~

Although looking at that statement, wouldn it just be smart to instead start work immiedtiely on your own game, rather than just port Halo stuff and try to mimic it? If your end goal is really your own game, I'd imagine you'd much rather try to start seeing stuff from that rather than another game.